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The Global Invasive Species Database (GISD) (see their website for more info here) has data on the invasiveness status of many species. From taxize you can now query the GISD database.
Introducing the function gisd_isinvasive. This function was contributed to taxize by Ignasi Bartomeus, a postdoc at the Swedish University Agricultural Sciences.
There are two possible outputs from using...

SMACOF stands for “Scaling by MAjorizing a COmplicated Function,” and it is a multidimensional scaling algorithm for metric unfolding of, among other things, rectangular ratings matrices.
One neat Political Science application of MDS is i...

By way of following up on an old in-joke, and doing something constructive because I couldn’t get to sleep, I thought I would revisit the Flag Space plot that I blogged about a while back and learn how to do it. … Continue reading →

Today’s short post will show how to make a simple map using map_data().
Let’s assume you have data in a CSV file that may look like this:
Notice the lower case state names; they will make merging the data much easier. The variable of inte...

Today I want to follow up with the XLLoop framework post. Please read the XLLoop framework post first to setup the XLLoop before trying the examples below. My first example is based on the TFX Package – to retrieve real-time FX quotes. To try this example, please first install the TFX Package. Please note that

A few quick plots of West Baltimore neighborhoods, first Sandtown-Winchester: and Harlem Park: These aren’t very polished, I’ll put up better versions. Here’s the code for those that want it: ## gis libraries library(spBayes) library(MBA) library(geoR) library(fields) library(sp) library(maptools) library(rgdal)...

One of the key predictors in my model for this crime project I’m working on is vacant houses and lots. I’ll speak to some findings about the relationship between levels of the different types of crime and vacant property in...

So, I really think this one is pretty cool. We spend much of our time in R making graphs with data, but what if you have a theory that you’d like to express graphically? Something like what I’ll call “economics-style” graphs, i...

Introduction
Markdown has been growing in popularity for writing documents on the web. With the introduction of R Markdown (see also Jeromy Anglim’s post on getting started with R Markdown) and knitr, R Markdown has simplified the publishing of R analysis on the web. I recently converted my website from Wordpress to Jekyll. Jekyll...